Apparatus for tempering and annealing car-wheels.



PATENTED NOV. 26, 1907.

J. M. HANSEN.

APPARATUS FOR TBMPERING AND ANNEALING CAR WHEELS.

APPLICATION FILED NOV.15,1906.

mm D

' WITNESSES.

INVENTQR V /T "Z41: mm

JOHN M. HANSEN, OF PITTSBURG, PENNSYLVANIA.

APPARATUS FOR TEMPERING AND ANNEALING GAR-WHEELS.

Specification of Letters Patent.

Patented Nov. 26, 1907'.

Application filed November 15. 1906. Serial No. 343,672.

To all whom it may concern:

Be it known that 1, JOHN M. HANSEN, a resident of Pittsburg, in thecounty of Allegheny and State ofPennsylvania, have invented a new anduseful Improvement in Apparatus for Tem ering and Annealing Car-Wheels;and I 0 hereby declare the following to be a full, clear, and exactdescription thereof.

My invention relates to apparatus for the manufacture of car wheels, andespecially to the tempering or hardening or retainin the hardness ofthetread face. thereof and the annealing of the body, including the weband hub. These car wheels are made from steel by forging operations orby combined forging and rolling operations, or are made of cast iron insuitable molds. It is desirable in such wheels that the body, includingthe hub andweb portions as well as the'inner portion of the tread shallbe as soft and tough and free from strains as racticable, while theouter face of the whee be as hard as possible so as to resist thewearing or abrading action of the Wheel and so extend its life.

The present invention has for its object to provide apparatus to thisend, and it is especially adapted for the treating of forged or forgedand rolled steel car wheels, though ap licable also to cast wheels.

he apparatus includes a case having a central heat retaining chamberinclosing the body of the wheel and a surrounding tread receiving orspraying chamber by which a suitable hardening medium can be projectedagainst the tread face of the wheel, these two chambers being preferablysealed from each other by means of suitable packing engaging the upperand lower faces of the wheel, and the wheel body being preferablysupported within the heat'retaining chamber, such asbya refractoryliningconforming in shape to the wheel body.

In the accompanying drawing Figure 1 is 'a vertical central section ofthe apparatus embodying the invention; Fig. 2 is a bottom view of theupper section thereof and Fig. 3 is a top view partly broken away of thelower section thereof.

1 The cooling case embodying the invention is formed of two sections 1,2, preferably made of cast metal. The lower section 1 has the cavity 3to receive the lining 4 of suitable refractory or heat retainingmaterial, such tight joint therewith to prevent the passage of thehardening or tempering fluid within the annealing or heat retainingchamber inclosing the hub and web. This packing 10 is shown as formed ofaring fitting within a dove-tailed seat formed in the lowercase, thepacking ring being held in place by the ring 10 secured to the case bysuitable screws as shown. This lower case 1 has formed in it the treadreceiving or spraying chamber 11, the outer wall of which is formed ofthe annular perforated plate 12 through which the water or otherhardening or cooling medium is projected against the said face of thewheel. Back of this annular perforated plate is the annular waterchamber 13 with which any suitable supply 14 communicates. Leading downfrom the spraying or tread receiving chamber 11 are a series of suitabledischarge openings 15. As shown in the drawing the lower edge of theannular perforated plate 12 is seated in the body of the lower case 1,and its u per edge is set in an annular plate 16 bolted to and formingthe top portion of the lower case.

The upper case or section 2 fits onto the lower case 1 as shown, and ithas the central cavity 17 in which is seated the fire brick or likelining 18 shown as held within the cavity by suitable bolts 19 fittingwithin seats 19 in the fire brick lining and extending up through boltholes 19 of the upper section 2 and held by suitable nuts 199. Thisupper fire brick lining preferably conforms to the shape of the wheel,having the central cavity 20 to receive the upper portion of the hub 6and the inclined face 21 fitting to the web portion 8 of the wheel andthe back portion of the tread portion 9 thereof. This upper case 2 isalso provided with a like asbestos or other heat retaining water proofacking 22, which contacts with the upper ace of the wheel tread and withthe packing 10 prevents passage; of water into any portion of the heatretaining chamber 23, formed asllO shown by the fire brick or likelinings and 18 i Wheel, after the completion of the for ing, or

forging and rolling o eration, while s ill at a suitable heat, is p acedwithin the case formed of the two sections 1 and 2, ,as above.

described. The body including the Web, and the inner portion of thetreadfare thus inclosed within the heat retaining chamber 23 while theouter portion of the tread 10 extends wlthin the spraying chamber 11 andthe passage of water into the heat retaining chamber 23 is prevented bythepackings 10 and 22. The weight of the upper case 2 holds 1t'1n lace.Water, oil or other suitable tempering or hardening medium is thenforced through the pipe 14, travels around through the annular chamber13 and is sprayed or rojected against the outer face of the trea actingto chill and temperor harden the same. The spraying is continued as longas desired, either during all or only a portion of the time ofthecooling of the Wheel. body, the water draining through the outlets 15and any steam formed-in. cooling and hardening the wheel escapingthrough the ports 24. The heat retaining chamber formed by the case isractically air tight and while so inclosing the wheel it prevents therapid escape of the heat from the same. Meanwhile, the heat is retainedwithin the body of the wheel, including the hub and web. and the innerportion of thetread, by 1ts mclosure within the heat retaining chamber23, so causing the gradual annealing of the same, and while exposing theouter face of the tread to the cooling or hardening ac tion, it isprevented from entering to too great depth into the wheel tread. It ispreferred that the faces of the heat retaininglinings in the chamber 23fit closely to the wheel body so as to support and prevent the warpingand dlstortion of the wheel body during cooling, 50 the fire-prooflining of the lower case giving I such support to the hub and referablyto the web of the Wheel body. T e-wheel can be held Within the caseuntil it is entirely cool,

the water spray being continued during all this time or a portionthereof as found best.

By this apparatus I am enabled to properly.

anneal or cool the wheel body and remove any strain therefrom and alsoto increase the hardness ofthe wearing surface andso to largely increasethe wearing qualities of the wheel. The apparatusj-may-also be used toadvantage with cast iron wheels to harden,

or retain the hardness of the chill or other surface of the wheel duringannealing. It

-may also be employed in connection with wheels which have been worn,such as by re-' dressing the face of the worn wheel and then heating thesame and placing it within the case and subjecting it to the same slowcooling action as the body and tempering or hardening the face, and thelife of the wheel is thus largely extended.

What I claim is:

1. An apparatus for treating car wheels having a central practically airtight heat retaining chamber adapted to envelop the body of the wheelwhen exposing the tread face thereof, and means for introducing ahardening medium against the tread face.

2. An apparatus for treating wheels hav ing a central practically airtight annealing or heat retaining chamber and an annular tread receivingchamber around the same and means for introducing a hardening, me diumtherein. 85

3. An apparatus for treating car wheels having a central practically airtight heat retaining chamber, an annular tread receiving chamber aroundthe same and sealing means between said chambers. I

4. An apparatus for treating car wheels having a central heat retainingchamber provided with a hub rest, and adapted to support the wheel athub and rim, and means for introducing a hardening medium against thetread face.

5. An apparatus for treating car wheels having a central heat retainingchamber provided with a refractory lining, a tread receiving chamberaround the same and means for introducing a hardening medium therein.

6. An apparatus for treating car wheels having a central heat retainingchamber provided with a refractory lining conforming in shape to andsupporting the body of the. wheel, an annular tread receiving chamberaround the same and means for introducing a hardening medium therein.

7. An apparatus for treating car Wheels having a central heat retainingchamber, an annular tread receiving chamber around the same, means forintroducing a hardening medium therein and drain openings extendingdownwardly from the base of said tread receiving chamber.

8. An apparatus for treating car wheels having a central heat retainingchamber, an annular tread receiving chamber around the same, means forintroducing a hardening medium therein, drain openings extending 120downwardly from the base of said tread receiving chamber, andsteam'outlets extending upwardly from said chamber. v

9. In apparatus for treating car wheels, the combination of thesectional case having 125 a tread receiving chamber 11, the perforatedouter wall 12, the annular, water chamber 13 around said perforatedwall, the upper section having steam outlets extending upwardly throughthe same. 130

10. In apparatus for treating car wheels, I medium against the treadface exposed bethe combination with a sectional case having tween thetwo sections.- 10 the lower section rovided with a central In testimonywhereof, I the said JOHN M. cavity, a fire brick lining fitting therein,the HANSEN have hereunto set my hand.

5 upper section having a central cavity and a JOHN M. HANSEN.

fire brick lining fitting therein, means forl Witnesses: suspending theu per lining in the upper sec- ROBERT C. ToTTEN,

tion, and means or introducing a hardening J. R. KELLER.

